The world's tallest man reached 8 feet 11 inches at 21.
202
Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
58
Yawns are more contagious among people with closer relationships.
163
Most of the world's people must walk at least 3 hours to fetch water!
38
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
The most recorded orgasms in an hour were 134 for one woman and only 16 for a man.
192